Lamp-shade holder



C. H. BISSELL.

LAMP SHADE HOLDER.

APPLICATION FILED ILILY I3, Isls.

Lgf@ l n Patented July 6 192W.

A A A lll dll

Alll

STTES TENT FFICE,

cenit n. `arsenite, or synncusn, usw roux, ias-sienes ro encuen-Hinescoivrrniir,

orsrnaeusn, New Yoan, a eonrennriciv er New Your;

LAMP-SHADE nonnen.

instar/i1.

Specification of Letters Patent.

Yl.)acl'ented July 6, 1920.

Application filed July 13, 1918. Serial No. 244,773.

To all whom t may. concern:

Be it known that l, CARL llrssnnn, a citizen oir theUnited States, and aresident oi Syracuse, in the county of @nondaga and tritate oi New York,have invented a certain new and useful Lamphade Holder, of which thefollowing is a speciiication.

lhis invention has for its object a shade holder particularly applicable.for holding a shade 'for electric lamps and for connec tion to aconduit outlet box supporting the lamp socket which shade holder isparticu larly simple in construction and highly etlicient and durable inuse; and the invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

ln describing this invention, reference is had to the accompanyingdrawings in which like characters designate corresponding parts'in allthe views.

Figure l is a side elevation oi my lamp shade holder, a conduit outletbox and the contiguous portion of a lamp being also shown.

liig. 2 is a sectional view, partly in elevation taken centrally in Fig.l, the shade being omitted.

llig. 3 is an elevation ol the detached shade holder.

This lamp shade holder comprises, generally, an expansible andcontractile shell or sleeve and means for contracting the sleeveincluding a member in the form of a spiral coil surrounding the sleeve.

The shell or sleeve is usually 'formed with a conoidal portion providedwith a peripheral spiral groove, and the clamping member is also in thetorni ci a conical helix and lies in said groove.

l designates the shell or sleeve which is usually formed of resilientsheet metal, it being provided with a plurality of spring tongues 2formed by splitting or slotting the sleeve lengthwise from its outer endtoward its inner end or base 3.

The intermediate portion l ot the sleeve is formed conoidal andincreases in diameter toward the outer or lower end of the shell andsaid conoidal portion is corrugated to vform a peripheral spiral grooveor thread 5.

The lower or outer ends oi the tongues 2 are deflected inwardly at 6 andthe extreme ends thereof turned outwardly forming a bead 8 for enteringthe annular external groove at the upper end or neck of the shade `9,

l is the clamping member which is of wire in the form ot a conicalspiral coil, said member l0 encircling the conoidal portion 4; ot' theshell and lying in the groove 5.

ldlhen the member l0 is turned to move upwardly the spring tongues 2expand so that shade 9 can be removed from engagement with the bead S.`When the member ll) is turned downwardly on the conoidal portion of thesleeve, the spring tongues 2 are contracted to cause the lower endsthereoi to snugly engage the neck of the shade 9.

The unslotted base portion 3 of the shell or sleeve l is encircled by aring ll which is secured thereto in any suitable manner as by rivets l2andthe ring is provided with an outwardly extending annular flange 13 bymeans oit which the shell is attached to a support as a conduit outletbox le in which the lamp socket l is located.

ln operation, the spiral clamping member is placed on the sleeve fromthe outer end of the sleeve by contracting the sleeve as much aspossible and expanding the spiral coil l0 over the widest part of theconoidal portion ot' the sleeve, the coil l0 heilig slightly resilientand expansible. The base portion of the shell is then inserted in theopening in one side ot the box lil and the flange 13 laps the outer'face ot'` the margin 16 ci? the wall around said opening and is securedthereto in any suitable manner as by screws.

`What l claim is:

l. A lamp shade holder comprising an expansible and contractile sleeveand a member for contracting the sleeve in the iorm of a spiral coilencircling the sleeve and rotatable thereon and movable axially thereofduring the rotatable movement, substantially as and :tor the purposedescribed.

2. A lamp shade holder comprising an expansible and contractile sleeve,and a member for contracting the sleeve in the i'orm of a spiral coilencircling the sleeve and movable axially thereon, the sleeve beingformed with an external spiral groove for receiving the convolutions ofsaid member, substantially as and for the purpose specied.

3. A lamp shade holder comprising a sleeve having a conoidal portion,and a member in the form oit a spiral coil encircling the conoidalportion of the sleeve, substantially as and for the purpose set forth.

'4. A lamp shade holder comprising a sleeve having a conoidal portion,and a member in the form of a conical spiral coil on the conoidalportion of the sleeve, the conoidal'portion of the sleeve being formedwith a spiral groove Vfor receiving the convolutions or' said member,substantially as and for the purpose described.

5. A lamp shade holder comprising a sleeve split longitudinally Vfromone end tolWard the base of the sleeve forming a plu-

